SIG Sauer 556 Arms Forum banner

picatinny rail

  1. 556 Lounge
    I have a couple questions about my handguard. I have the 556 Classic with the Swiss style handguard. I need to know at least one of these things. 1. What is the size of the screws required to mount rail sections on the handguard? 2. Does Sig still make the quad rail handguards that came on the...
Top